/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMModel/RigVMController.h
bool BreakLink ( [URigVMPin](API\Plugins\RigVMDeveloper\RigVMModel\URigVMPin) * OutputPin, [URigVMPin](API\Plugins\RigVMDeveloper\RigVMModel\URigVMPin) * InputPin, bool bSetupUndoRedo )